Former Ghana Olympic striker came to prominence in 2002 when he was promoted from the junior team of Kotoko and succeeded in making an immediate impact in Kotoko's journey to the finals of the 2002 African Cup Winner Cup, which they eventually lost to Raja Casablanca of Morocco in the final.

Moved to Danish side FC Midtjylland with a huge of potential from local side King Faisal in 2004. Poku failed to settle in Denmark since his move and managed to score only three goals in 27 appearances. He was given the boot in April 2007.

He was part of the Ghanaian team that played at the 2004 Olympic Games in Athens